Physics – Optics
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21542323m&link_type=abstract
American Astronomical Society, AAS Meeting #215, #423.23; Bulletin of the American Astronomical Society, Vol. 42, p.330
Physics
Optics
Scientific paper
We present a pre-discovery H-band image of the HR 8799 planetary system that reveals all three planets in August 2007. The data were obtained with the Keck adaptive optics system, using angular differential imaging and a coronagraph. We confirm the physical association of all three planets, including HR 8799d, which had only been detected in 2008 images taken two months apart, and whose association with HR 8799 was least secure until now. We confirm that the planets are 2-3 mag fainter than field brown dwarfs of comparable near-infrared colors. We note that similar under-luminosity is characteristic of young substellar objects at the L/T spectral type transition, and is likely due to enhanced dust content and non-equilibrium CO/CH4 chemistry in their atmospheres. Finally, we place an upper limit of 18 mag per square arc second on the >120 AU H-band dust-scattered light from the HR8799 debris disk. The upper limit on the integrated scattered light flux is 1e-4 times the photospheric level, 24 times fainter than the debris ring around HR 4796A.
Marois Christian
Metchev Stanimir A.
Zuckerman Ben
No associations
LandOfFree
Pre-Discovery 2007 Image of the HR 8799 Planetary System does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Pre-Discovery 2007 Image of the HR 8799 Planetary System, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pre-Discovery 2007 Image of the HR 8799 Planetary System will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-967235